The reduction of toxic metal, especially Cr6+, could be done by ion exchange resin. The substitution of Cr6+ ion with other non-toxic ion contained in the resin will reduce the amount of toxic chromium to the permitted level. In this study ion exchange was done using Dowex SBR-P (Styrene-DVB) anion resin.ud Experiments were done using potassium dichromate (K2Cr2O7) as source of Cr6+ ion. This compound was diluted in water inside a beaker glass. Then a desired amount of resin were added and stirred at until a desired time reached. The result was analyzed by spectrophotometric method using 1-5 diphenylcarbazide (DPC) as an indicator. Results shows the highest adsorption was 40.64%, reached at stirring speed of 190 rpm, for 60 minutes and resin weight 25 gram with the amount of potassium dichromate 3.3 gram.udKeywords: chromium metal, ion exchange resinud
展开▼
机译：离子交换树脂可以还原有毒金属，尤其是Cr6 +。用树脂中包含的其他无毒离子取代Cr6 +离子会将有毒铬的含量降低到允许水平。在这项研究中，使用Dowex SBR-P（苯乙烯-DVB）阴离子树脂进行离子交换。 ud使用重铬酸钾（K2Cr2O7）作为Cr6 +离子源进行了实验。将该化合物在烧杯玻璃中的水中稀释。然后加入所需量的树脂并在50℃下搅拌直至达到所需时间。使用1-5二苯基咔嗪（DPC）作为指示剂，通过分光光度法对结果进行分析。结果表明，最高吸附率为40.64％，在190 rpm的搅拌速度下持续60分钟，树脂重量为25克，重铬酸钾为3.3克。 ud关键字：铬金属，离子交换树脂 ud
展开▼
